Hi, And I want to know the "phase noise variance" of our instrument?Thanks so much.
2016-03-01 20:50 GMT+08:00 w xd <[email protected]>: > Hi, > > I used the USRP N210 and sbx board.What is the dynamic range of the > instrument?Namely the maximum SNR?Thanks so much. > > Best Regards, > zs > > 2016-03-01 19:58 GMT+08:00 Marcus Müller <[email protected]>: > >> I think that question answers itself if you consider what SNR is. >> >> Best regards, >> Marcus >> >> >> On 01.03.2016 12:34, w xd wrote: >> >> Thanks so much. >> >> In this case,I just change the gain of the transmitter,will be change the >> snr of the receiver? >> >> Thanks. >> >> 2016-03-01 19:02 GMT+08:00 Marcus Müller <[email protected]>: >> >>> Dear zs, >>> >>> > I want to change the ratio of power of the received signal to power of >>> the noise. >>> >>> well, improving receiver SNR is the *core* problem of all wireless >>> communication. Unless you just add noise (on the receiver or the >>> transmitter side, depending on whether you want your noise to be >>> channel-shaped or not), there's your whole digital communication knowledge >>> you can apply (matched filtering, oversampling, coding gain, preselection >>> filtering...). >>> >>> > And I want to change the gain of the transmitter. >>> Well, then do that. The usrp_sink block has a TX gain setting, and all >>> daughterboards (aside from the Basic*, LF* and TVRX* boards) have >>> adjustable gain: use the set_tx_gain(gain) method, or if you're using GRC, >>> look into the "RF settings" tab. >>> >>> Best regards, >>> Marcus >>> >>> >>> On 01.03.2016 09:56, w xd wrote: >>> >>> Sorry for that. >>> >>> I'm now using the USRP N210,one transmitter and one receiver.I want to >>> change the ratio of power of the received signal to power of the noise.And >>> I want to change the gain of the transmitter. >>> >>> 2016-03-01 16:45 GMT+08:00 Marcus Müller < <[email protected]> >>> [email protected]>: >>> >>>> Dear zs, >>>> >>>> your question is absolutely unclear. SNR of what? What instrument? TX >>>> or RX, or simulation? >>>> >>>> Best regards, >>>> Marcus >>>> >>>> >>>> On 01.03.2016 07:06, w xd wrote: >>>> >>>> Hi, >>>> >>>> I want to change the SNR through gnuradio.Can I realize it by just >>>> change the gain of the gnuradio?Or the instrument is fixed,and the snr >>>> can't be change? >>>> >>>> Thanks so much. >>>> >>>> Best Regards, >>>> zs >>>> >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing >>>> [email protected]https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>>> >>>> >>>> _______________________________________________ >>>> Discuss-gnuradio mailing list >>>> [email protected] >>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio >>>> >>>> >>> >>> >> >> >
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